To Promote More Efficient Ventricular Emptying by Decreasing Preload in the Patient

To promote more efficient ventricular emptying by decreasing preload in the patient with chronic heart failure,the nurse should implement which of the following actions?

A) Administer oxygen per mask.
B) Encourage active leg exercises to increase venous return.
C) Administer sedatives to promote rest and decrease myocardial oxygen demand.
D) Position the patient in a high-Fowler's position with the feet horizontal in the bed.